<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="loginForm"
             :rules="loginRules"
             class="login-form"
             auto-complete="on"
             label-position="left">

      <div class="title-container">
        <h3 class="title">javaScript知识总结</h3>
      </div>

      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="username"
          v-model="loginForm.username"
          placeholder="Username"
          name="username"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <!--show-password 看密码-->
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="Password"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <!--显示眼睛的开关-->
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>

      <el-form-item prop="authCode" style="">
        <el-input class="input-item"
                  tabindex="2"
                  auto-complete="on"
                  @keyup.enter.native="handleLogin"
                  v-model.trim="loginForm.authCode"
                  clearable
                  :placeholder=" `输入yzm`">
        </el-input>
        <span class="yzmBtn" id="v_container"></span>
      </el-form-item>

      <el-button :loading="loading"
                 type="primary"
                 style="width:100%;margin-bottom:30px;"
                 @click.native.prevent="handleLogin">登录</el-button>

      <div class="tips">
        <span style="margin-right:20px;">username: admin</span>
        <span> password: 123456</span>
      </div>

    </el-form>
  </div>
</template>

<script>
import { validUsername ,validUserpwd } from '@/utils/validate'
import validateCode from "@/utils/validateCode"
import {trim} from "@/utils";

export default {
  name: 'Login',
  data() {
    //表单验证规则
    const validateUsername = (rule, value, callback) => {
      //如果username中不含有输入的值
      if (!validUsername(value)) {
        callback(new Error('请输入正确的用户名e'))
      } else {
        callback()
      }
    }
    const validatePassword = (rule, value, callback) => {
      //如果userpwd中不含有输入的值
      if (!validUserpwd(value))  {
        callback(new Error('密码不对e'))
      } else {
        callback()
      }
    }
    // 检查验证码
    const checkCode = (rule, value, callback) => {
      console.log(value)
      if (!value) {
        callback(new Error("输入验证码"))
      } else if (value !== this.verifyCode.options.code) {
        callback(new Error("输入验证码错误请重试"))
        this.verifyCode.refresh()
      } else if (value == this.verifyCode.options.code){
        callback()
      }
    }
    return {
      loginForm: {
        //默认表单填好的值
        username: 'admin',
        password: '123456',
        authCode: ''
      },
      loginRules: {
        username: [{ required: true, trigger: 'blur', validator: validateUsername }],
        password: [{ required: true, trigger: 'blur', validator: validatePassword }],
        authCode: [{ required: true, validator: checkCode, trigger: 'blur' }]
      },
      //是否显示加载状态
      loading: false,
      passwordType: 'password',
      //用于记录去过的路由
      redirect: undefined,
      verifyCode: null //验证码
    }
  },
  mounted() {
    if (window.GVerify){
      this.verifyCode = new GVerify('v_container');
      console.log(this.verifyCode)
    }

  },
  watch: {
    $route: {
      handler: function(route) {
        //如果两个值都有则返回后面的
        this.redirect = route.query && route.query.redirect
      },
      //当route变化时立即执行handler函数
      immediate: true
    }
  },
  methods: {
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        //记得聚焦
        this.$refs.password.focus()
      })
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        console.log(this.loginForm)
        if (valid) {
          this.loading = true
          this.$store.dispatch('user/login', this.loginForm).then(() => {
            // 这个方法用于跟踪：我是从哪里跳到/login页面的，登录后我就返回哪里
            this.$router.push({ path: this.redirect || '/' })
            this.loading = false
          }).catch(() => {
            this.loading = false
          })
        } else {
          console.log('提交错误')
          this.verifyCode.refresh() // 刷新码
          return false
        }
      })
    }
  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg:#283443;
$light_gray:#fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui CssPartial */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
  .yzmBtn{
    width: 105px;
    height: 40px;
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
</style>
